No matter how many times you repeat that, it's still as wrong as it was the first time. Quoting to save time:
If, (as is the case with this forum), there is substantial financial exposure, obviously consult a real attorney.
In short, claims that "you can advertise anything, as long as it is legal in the seller's jurisdiction" are clearly false.
...
If you want to discuss the rationality of your argument (which has nothing to do with IRL law), your reasoning goes something like this:
You: Your honor, though this is an English forum administered by an American person, from American soil, the advertising is aimed at MARTIANS.
Judge: Say what?
You: Martians, your honor. Does Mars have a body of law regarding Ponzi schemes?
Judge: Whata...
You: Huh, thought not! Well, the ads are intended for Martians, where Ponzis are perfectly legal.
Judge: I see... Well, that certainly puts a new spin on things... ... wirrr... *smoke pours out of Judge's louvered vents*
You: Checkmate! *smile triumphantly*
Is this how you think law works, Salty?
@surfer43 (below) No, they are illegal, period.
What you are describing is some of the ways they are prosecuted. Full text you're quoting from here: http://www.ftc.gov/public-statements/1998/05/pyramid-schemes
The scheme in question, MakeBTC.org, is also clearly misrepresenting itself as an investment:
"MakeBTC's unique investment system allows you to provide yourself with future wealth! You will earn residual bitcoin income over time as the website evolves."
Fraudulent scheme is fraudulent.
Nobody stated that you could advertise anything you wanted as long as it was legal in whatever country you were DIRECTING the ads towards, which is what your made up stupid scenario is implying.
Get your facts straight and stop putting words in people's mouths.
You've already lost, give up.